Water pump

Take it back to the guy that did the work. He may have misaligned your timing belt in the exchange and your car is firing at the wrong time in each cylinder's compression cycle.

Cam timing is probably off, or your missing a plug connection.

Check the spark if it doesn’t check the fuses and you can and crank position sensor if not take it back it’s not worth it if you aren’t an experienced mechanic

They didn't put timing belt back on right